增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1．每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分。
As it is known to us, fewer and fewer students do sports regular, which makes them weak and easily tired.
There have many reasons for this. First of all, some of the students complain that they have too many homework, result in less time to take exercise. Beside, some of them think that it is very difficult for them to keep doing exercise, because it is very hard thing.
For lack of physical activities, many students were in poor health. I suggest that our school must take measures to encourage more students to take part in sports. For us students, no matter what busy we are, it is necessary to spare some time to do exercise.
